Cooler



FIG. 1 is a perspective view showing my new design for a cooler;

FIG. 2 is a front view showing my new design shown in FIG. 1;

FIG. 3 is a right side view showing my new design shown in FIG. 1, the left side view being identical;

FIG. 4 is a back view showing my new design shown in FIG. 1;

FIG. 5 is a top view showing my new design shown in FIG. 1; and,

FIG. 6 is a bottom view showing my new design shown in FIG. 1. 

We claim the ornamental design for a cooler, as shown and described. 